Add a path to use CALayers to display content

content/content_browser.gypi

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'dependencies': [
     'browser/speech/proto/speech_proto.gyp:speech_proto',
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
     '../google_apis/google_apis.gyp:google_apis',
@@ skipping 704 matching lines @@
     'browser/renderer_host/backing_store_win.h',
     'browser/renderer_host/basic_mouse_wheel_smooth_scroll_gesture.cc',
     'browser/renderer_host/basic_mouse_wheel_smooth_scroll_gesture.h',
     'browser/renderer_host/clipboard_message_filter.cc',
     'browser/renderer_host/clipboard_message_filter.h',
     'browser/renderer_host/clipboard_message_filter_mac.mm',
     'browser/renderer_host/compositor_impl_android.cc',
     'browser/renderer_host/compositor_impl_android.h',
     'browser/renderer_host/compositing_iosurface_context_mac.mm',
     'browser/renderer_host/compositing_iosurface_context_mac.h',
+    'browser/renderer_host/compositing_iosurface_layer_mac.h',
+    'browser/renderer_host/compositing_iosurface_layer_mac.mm',
     'browser/renderer_host/compositing_iosurface_mac.h',
     'browser/renderer_host/compositing_iosurface_mac.mm',
     'browser/renderer_host/compositing_iosurface_shader_programs_mac.cc',
     'browser/renderer_host/compositing_iosurface_shader_programs_mac.h',
     'browser/renderer_host/compositing_iosurface_transformer_mac.cc',
     'browser/renderer_host/compositing_iosurface_transformer_mac.h',
     'browser/renderer_host/database_message_filter.cc',
     'browser/renderer_host/database_message_filter.h',
     'browser/renderer_host/dip_util.cc',
     'browser/renderer_host/dip_util.h',
@@ skipping 678 matching lines @@
         '../third_party/speex/speex.gyp:libspeex',
       ],
     }],
     ['linux_use_libgps==1', {
       'dependencies': [
         '../build/linux/system.gyp:libgps',
       ],
     }],
   ],
 }